1 files changed, 151 insertions, 0 deletions
diff --git a/common/debug.c b/common/debug.c
new file mode 100644
index 0000000..cca9aaf
--- /dev/null
+++ b/common/debug.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2011 Collabora Ltd.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *     * Redistributions of source code must retain the above
+ *       copyright notice, this list of conditions and the
+ *       following disclaimer.
+ *     * Redistributions in binary form must reproduce the
+ *       above copyright notice, this list of conditions and
+ *       the following disclaimer in the documentation and/or
+ *       other materials provided with the distribution.
+ *     * The names of contributors to this software may not be
+ *       used to endorse or promote products derived from this
+ *       software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ *
+ * CONTRIBUTORS
+ *  Stef Walter <stef@memberwebs.com>
+ */
+
+#include "config.h"
+
+#include "debug.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+struct DebugKey {
+	const char *name;
+	int value;
+};
+
+static struct DebugKey debug_keys[] = {
+	{ "lib", P11_DEBUG_LIB },
+	{ "conf", P11_DEBUG_CONF },
+	{ "uri", P11_DEBUG_URI },
+	{ "proxy", P11_DEBUG_PROXY },
+	{ 0, }
+};
+
+static int debug_inited = 0;
+static int debug_strict = 0;
+
+/* global variable exported in debug.h */
+int p11_debug_current_flags = ~0;
+
+static int
+parse_environ_flags (void)
+{
+	const char *env;
+	int result = 0;
+	const char *p;
+	const char *q;
+	int i;
+
+	env = getenv ("P11_KIT_STRICT");
+	if (env && env[0] != '\0')
+		debug_strict = 1;
+
+	env = getenv ("P11_KIT_DEBUG");
+	if (!env)
+		return 0;
+
+	if (strcmp (env, "all") == 0) {
+		for (i = 0; debug_keys[i].name; i++)
+			result |= debug_keys[i].value;
+
+	} else if (strcmp (env, "help") == 0) {
+		fprintf (stderr, "Supported debug values:");
+		for (i = 0; debug_keys[i].name; i++)
+			fprintf (stderr, " %s", debug_keys[i].name);
+		fprintf (stderr, "\n");
+
+	} else {
+		p = env;
+		while (*p) {
+			q = strpbrk (p, ":;, \t");
+			if (!q)
+				q = p + strlen (p);
+
+			for (i = 0; debug_keys[i].name; i++) {
+				if (q - p == strlen (debug_keys[i].name) &&
+				    strncmp (debug_keys[i].name, p, q - p) == 0)
+					result |= debug_keys[i].value;
+			}
+
+			p = q;
+			if (*p)
+				p++;
+		}
+	}
+
+	return result;
+}
+
+void
+p11_debug_init (void)
+{
+	p11_debug_current_flags = parse_environ_flags ();
+	debug_inited = 1;
+}
+
+void
+p11_debug_message (int flag,
+                    const char *format, ...)
+{
+	char buffer[512];
+	va_list args;
+
+	if (flag & p11_debug_current_flags) {
+		va_start (args, format);
+		vsnprintf (buffer, sizeof (buffer), format, args);
+		buffer[sizeof (buffer) -1] = 0;
+		va_end (args);
+		fprintf (stderr, "(p11-kit:%d) %s\n", getpid(), buffer);
+	}
+}
+
+void
+p11_debug_precond (const char *format,
+                    ...)
+{
+	va_list va;
+
+	va_start (va, format);
+	vfprintf (stderr, format, va);
+	va_end (va);
+
+	if (debug_strict)
+		abort ();
+}